document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=393668>Question 393668</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The probability that an employee at the company is over 30 years old is 0.7 if 15 employees are asked their age find the probability that<BR>\n" );
document.write( "A) 5 are over 30 years old<BR>\n" );
document.write( "B)at least 10 are over 30 years old<BR>\n" );
document.write( "C) fewer than 8 are over 30<BR>\n" );
document.write( "D)mean<BR>\n" );
document.write( "E) variance<BR>\n" );
document.write( "F) standard deviation </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #279351 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=279351\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The probability that an employee at the company is over 30 years old is 0.7 <BR>\n" );
document.write( "If 15 employees are asked their age find the probability that<BR>\n" );
document.write( "A) 5 are over 30 years old<BR>\n" );
document.write( "P(x = 5) = binompdf(15,0.7,5) = 0.0030<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "B)at least 10 are over 30 years old<BR>\n" );
document.write( "P(10<= x <=15) = 1-binomcdf(15,0.7,9) = 0.7216<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "C) fewer than 8 are over 30 <BR>\n" );
document.write( "P(0<= x <=7) = binomcdf(15,0.7,7) = 0.0500<BR>\n" );
document.write( "---<BR>\n" );
document.write( "D)mean = np = 15*0.7<BR>\n" );
document.write( "---<BR>\n" );
document.write( "E) variance = npq = 15*0.7*0.3<BR>\n" );
document.write( "---<BR>\n" );
document.write( "F) standard deviation = sqrt(variance)<BR>\n" );
document.write( "=========================================<BR>\n" );
document.write( "cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );